Chromium(VI) is a known carcinogen that is very difficult to remove from groundwater. One potential method of remediation of chromium(VI)- contaminated groundwater involves using iron nanoparticles. The iron reduces chromium(VI) to chromium(III) which is less toxic and is easier to remove from groundwater. Bench-top experiments have been performed to on well-characterized solutions in order to determine the kinetics of the reaction in order to determine the conditions under which the reaction is most effective. The studies have involved varying the pH of the solution and the size of the nano-particles. First order kinetics appears to describe the system. Experimental details and the results of these experiments are the subjects of this presentation.